+1!!
as I'm sure you can understand there's a lot of pages to this thread so sifting through for the answer to my question could take a while... if wish's have no truss rod, what happens if u want to adjust it? or if you change your string guage you use? do you just have bad action?
In modern electric basses (thin necks + truss rods), the neck is a flexible thing. The 'system' is designed so that the strings at tension provide force in one direction (away from the top) and the truss rod provides counterforce away from the back. The forces are equal, so the neck stays in one place. Changing the string tension typically requires a minor truss rod adjustment to counterbalance the new tension.
On a Wishbass, on the other hand, the neck just DOESN'T MOVE. Switching to lighter gauge? No problem. It doesn't move. Heavier? Again, it doesn't move. It's like putting tuners and strings on a steel I-beam.

So assuming the fingerboard is pretty much parallel to the strings (zero relief) as most fretlesses are set up, the string gauge pretty much doesn't change things. Nut depth and bridge height thus determine the action. It's a much simpler process with fewer variables.
All this implies a nice flat fingerboard. While mine was pretty good when I bought it, it had a couple of buzzy notes. I took it in to a reputable guitar shop and had the fingerboard planed. $45 later, I couldn't believe the improvement.
So within reason, the string gauge shouldn't make much difference, due to the neck construction and its overall thickness and strength. I believe I've only heard one report in Usenet and Talkbass over several years about neck warpage, and even then, it was repairable using standard 'classical' techniques (neck cooking).
If you like the action a little higher, shim the bridge. Lower? Sand the underside of the bridge. Some folks have been adding adjustable bridges and saddles, which I'm sure work fine as well. Wish's instruments are a lot like upright basses, where things are nice and flat and the bridge height is pretty much the only adjustment people ever need.
Good luck with your decisions.